“…School-based health interventions have met with a degree of success where access to young people has been the primary policy hurdle to be overcome, as in the case of immunisation programmes (Duffy, 1978). However, where interventionsboth curricular and extra-curricular-have sought to address complex behavioural matters such as alcohol and drug use, sexual behaviour, obesity and mental health, decades of research paint a far less encouraging picture (di Mauro & Joffe, 2007;Fletcher, Bonell, Sorhaindo, & Strange, 2009;Milgram, 1976). The reasons for this are varied but amongst the most regularly described in the literature are teachers' lack of specialist expertise, the uninspiring, short-term or coercive nature of interventions, parental and student resistance, the crowded school curriculum and the multifactorial nature of health behaviour (Adelman & Taylor, 2006;Thomas, 2006;Van Hook & Altman, 2012).…”